install Error on Centos 7

I got this message when trying installation CentOS Web Panel

configure: error: mcrypt.h not found. Please reinstall libmcrypt.
make: *** No targets specified and no makefile found.  Stop.
make: *** No rule to make target `install'.  Stop.
cp: cannot create regular file ‘/usr/local/php/php.ini’: No such file or directory

Compiler requires 512 MB RAM + SWAP
Installation FAILED at php

how much ram 6 swap you have on your server?
CWP is not tested on CentOS 7 as this is still beta.